When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Fluorescent-lamp formats - Wikipedia

   en.wikipedia.org/wiki/Fluorescent-lamp_formats

   In the 1970s, 34-watt energy-saving F40T12 fluorescent lamps were intoroduced in the United States. In the 1980s, T8 32-watt lamps were introduced, [8] but unlike the T8 tubes introduced in Europe, these T8s are not retrofits and require new matching ballasts to drive them. These ballasts were originally magnetic, but most today are electronic.

3. Bi-pin lamp base - Wikipedia

   en.wikipedia.org/wiki/Bi-pin_lamp_base

   The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...

4. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   Fluorescent Linear Tube Light bulbs are measured in 1 ⁄ 8 of inches. So a T12 fluorescent is 12 ⁄ 8 of an inch in diameter or 12 ⁄ 8 = 1.50" T4 – 4/8 or 0.500 ...

5. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   The typical luminous efficacy of fluorescent lamps is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output (e.g. the luminous efficacy of an incandescent lamp may only be 16 lm/w).

6. List of automotive light bulb types - Wikipedia

   en.wikipedia.org/wiki/List_of_automotive_light...

   12 V: 19 W PGJ19-3 H16B 1 12 V: 19 W PGJY19-3 H21W 1 12 V & 24 V: 21 W BAY9s H27W/1 1 12 V: 27W PG13 USA ANSI № 880 H27W/2 1 12 V: 27 W PGJ13 USA ANSI № 881 HB3 1 12 V: 60 W P20d 90° USA, Japan ANSI № 9005 ECE nominal luminous flux: 1700 lm ±15% HB3A 1 12 V: 60 W P20d 180° USA ANSI № 9005XS HB4 1 12 V: 51 W P22d 90° USA, Japan

7. Wedge base - Wikipedia

   en.wikipedia.org/wiki/Wedge_base

   The wires are usually inserted into a plastic base that the bulb is mounted in, and which is often narrower at the tip than at the bulb, giving it a wedge shape and usually ensuring a tight connection, depending on manufacturing tolerances. Some bulbs have no plastic base, and the wires are simply bent up to the sides of the bulb's glass base.